linux-kernel - Re: [PATCH 2/4] arm: let set_memory

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Date:	Mon, 25 Jan 2016 10:41:47 -0800
From:	Laura Abbott <labbott@...hat.com>
To:	mika.penttila@...tfour.com, linux-kernel@...r.kernel.org
Cc:	linux-mm@...ck.org, rientjes@...gle.com, linux@....linux.org.uk,
	"linux-arm-kernel@...ts.infradead.org >> linux-arm-kernel" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 2/4] arm: let set_memory_xx(addr, 0) succeed.

On 01/23/2016 07:05 AM, mika.penttila@...tfour.com wrote:
> From: Mika Penttilä <mika.penttila@...tfour.com>
>
> This makes set_memory_xx() consistent with x86.
>
> Signed-off-by: Mika Penttilä mika.penttila@...tfour.com
>
> ---
>   arch/arm/mm/pageattr.c | 3 +++
>   1 file changed, 3 insertions(+)
>
> diff --git a/arch/arm/mm/pageattr.c b/arch/arm/mm/pageattr.c
> index be7fe4b..9edf6b0 100644
> --- a/arch/arm/mm/pageattr.c
> +++ b/arch/arm/mm/pageattr.c
> @@ -49,6 +49,9 @@ static int change_memory_common(unsigned long addr, int numpages,
>   		WARN_ON_ONCE(1);
>   	}
>
> +	if (!numpages)
> +		return 0;
> +
>   	if (start < MODULES_VADDR || start >= MODULES_END)
>   		return -EINVAL;
>
>

Reviewed-by: Laura Abbott <labbott@...hat.com>